Dressing attachment for vertical-surface grinders



C. KNOWLES mwssms ATTACHMENT FOR VERTICAL s'uamcs eamnms' F'iIed Oct.24. 1922 INVENTORI. Can/L0H TOnow-fiu wfi ww Y ATTORNEY Patented Nov.10, 1925.

v UNITED STATES 1,560,69! PATENT, OFFICE.

oARRQLL KNOWLES, or HARTFORD, CONNECTICUT, ASSIGNOR To PRATT & WHITNEYCOMPANY, on NEW YORK, 1v. Y., A CORPORATION. on NEW JERSEY.

DRESSING ATTACHMENT FOR VERTICAL-SURFACE GRINDERS.

Application filed October 24, 1922- Serial No. 596,664.

To all whom it may concern:

Be it known that I, CARROLL KNOWLES, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inDressing Attachments for Vertical-Surface Grinders, of which thefollowing is a specification.

This invention relates to a tool adapted to dress the work engagingsurface of an abrasive wheel. More particularly, the invention relatesto a hand tool to facilitate the operation of dressing the abrasiveWheel of a vertical surface grinding machine.

An object of the present invention is to provide a simple, inexpensivedressing tool which may be conveniently supported from the wheel head orother part of a vertical surface grinder and adapted to be manuallymoved about in contact with the abrasive wheel.

One feature which enables me to accomplish the above object is that Iprovide a support for the dressing tool having a seat forming a portionof a spherical surface, this seat preferably being formed' in the uardsurrounding the wheel. Adapted to be suspended from said seat so as tobe movable in all directions is the dressing tool forming a part of thepresent invention. V

Another feature which is advantageous is that the dressing tool isprovided with a convenient handle whereby it may be readi- 1y movedabout in contact with the abrasive wheel and is also provided with asupple,- mental handle at an angle to the first'handle having a portionof a spherical surface adapted to contact with the spherical seat on theguard from which the tool is suspended.

Another. feature which is advantageous is that the tool may be quicklyplaced in 0perative position when it is desired to dress the wheel bysimply placing the supplemental handle in contact with the sphericalseat, and, when the dressing operation has been completed, the tool maybe quickly removed. 7

With these and other objects in view, my invention consists in thefeatures of construction and operation set forth in the accompanyingspecification and illustrated in the accompanying drawing.

of which the Wheel head 11 and t Figure l is a side elevation of aportion of a vertical surface grinder, parts be ing broken away to showthe dressing tool in operative position thereon.

Fig. 2 is a sectionalview taken on line 22 of Fig. 1.

Fig. 3 is a vertical sectional view taken on line 3-3 of Fig. 2, and

Fig. 4' is a ing tool.

Briefly, my invention in its broadest aspect comprises: A tool adaptedfor use with a surface grinder such as theone shown in side elevation inFig. 1; This may include a wheel rotatably mounted upon a vertical axiswithin a vertically movable head. Below the wheel is a table upon whichwork may be mounted, the table shown in' Fig. 1 being rotary. A supportupon a portion of the wheel head adjacent the wheel is pro vided topivotally support a dressing tool having parts such 'as steel disksadapted to contact with the work engaging surface of the wheel. .On thisdressing toolis a handle so that the tool may be moved about while incontact with the wheel. Preferably a supplemental. handle is providedhaving a portion of a spherical surface forming a means on the toolengaging the support on the wheel head.

Referring morein detail to the figures'of the drawing, at 10 I show thebase of a vertical surface grinding machine having a movable tool head11 adapted to be raised or lowered upon suitable Ways on a housing 12.Within the head 11 is rotatably mounted a wheel spindle 13 carrying anabrasive wheel 14 at its lower end. A pulley 15 fastened to thespindle13 provides means for rapidly rotating the spindle and wheel. Alever 16 is provided bg means e wheel perspective view of the dress- 14may be raised or lowered. Below the wheel 14' is a table 17 which may beof any desired form, suitable means being provided to rotate orreciprocate it in accordance with the type of table used. As these partsare the usual and principal parts of a surface grinding machine, theywill not be more particularly described.

Mounted on the head 11 adjacent the wheel 14 is an annular guard member20 which closely surrounds the abrasive wheel 14 and is secured inposition thereon by means of the clamping screw 21. This guard 20 may beof any preferred type, the one shown in the figure being merely forillustrative purposes. On this guard 20 is an outstanding projection 22either formed integral or suitably fastened thereto which is providedwith a slot 23. Surrounding the slot 23 is a circular depression forminga portion of a spherical surface shown at 24. This surface 24 providesthe bearing mem- 3E1 of a ball and socket for the tool presently to bedescribed.

Adapted to be supported by means of the projection 22 is the dressingtool shown generally at 25. This at one end is provided ,with toolcontacting a-nddressing means in the form of hardened steel disks 26formed P the usual manner to cut away the work engaging surface of thewheel during the dressing operation. At the oppositely extended portionof the tool 25 is a handle 27 of any preferred form, that shown in Fig.4 being preferred. In addition to the handle 27 a supplemental handle 28is provided which preferably extends at right angles to the main portionof the tool 25 and is provided with a portion of a spherical surfacecorresponding exactly in diameter to the surface 24. e

I In order to dressthe work engaging surof the wheel 14, it is onlynecessary to position the supplemental handle 29 upon the projection 22insuch a manner that the surface 29 on the dressing tool 25 engagesthesurface 24 on the projection 22. With the dressing tool 25 in thisposition, it may be moved about in any direction so that the disk 26will contact with the wheel 14. By

manually moving the tool 25 about by means of the handles 27 and 28, thesurface of the wheel 14 may be suitably and evenly dressed. "What Iclaim is:

1. A dressing tool for grinding wheels comprising, a surfacing memberadapted to engage and dress the work engaging surface of a wheel, ahandle on said tool, a second handle thereon positioned at anintermediate point of said tool, and means on said second handle tosuspend said tool adjacent said wheel whereby it may be moved about iiiall directions in contact with the wheel.

2. A dressing tool for grinding wheels comprising, a surfacing memberadapted to engage and dress the work engaging surface of a wheel, ahandle on said tool, and means comprising a supplementary handlepositioned at an intermediate point of said tool and'having a portion ofa spherical surface thereon to suspend said tool adjacent wheel wherebyit may be moved about in all directions in contact with the wheel.

3. A dressing tool for grinding wheels comprising, a surfacing memberadapted to engage and dress the work engaging surface of a wheel, ahandle on said tool, a second handle thereon positioned at anintermediate oint of said tool and angularly disposed relative to thefirst handle, and means on said second handle to suspend said tooladjacent said wheel whereby it may be moved about in all directions incontact with the wheel.

4. A dressing tool for grinding wheels comprising, a surfacing memberadapted to engage and dress the work engaging surface of a wheel, ahandle on said tool at the end of the tool opposite the surfacing memberand offset therefrom, a second handle thereon positioned at anintermediate point of said tool, and means on said second handle adaptedto engage supplementary means adjacent the wheel to suspend said toolwhereby it may be moved about in all directions I in contact with thewheel.

In testimony whereof, I hereto affix my signature.

CARROLL KNOWLES.

